ATEX vs WST: Correlation
Anterix Inc. (ATEX) and West Pharmaceutical Services (WST) show a negative relationship: their 3-year correlation of weekly returns is -0.20.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ATEX and WST?
On 3 years of weekly data the ATEX/WST correlation comes out at -0.20, negative, meaning they tend to move in opposite directions. The past 12 months show a tighter link (0.22) than the 3-year average (-0.20). The 5-year figure is -0.08, and annualized covariance runs at -441.4 %².
WST is close to the least connected end of ATEX's tracked universe, ranking #11 of 11. Correlation aside, the last 12 months split them widely, with ATEX ahead by 259.4 points (+300.5% versus +41.1%).
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
ATEX vs WST: side by side
| ATEX (Anterix Inc.) | WST (West Pharmaceutical Services) | |
|---|---|---|
| 1-year return | +300.5% | +41.1% |
| 5-year return | +66.1% | -22.4% |
| Volatility (ann.) | 57.8% | 38.6% |
| Beta vs S&P 500 | 0.47 | 0.86 |
| Max drawdown (3Y) | -57.3% | -53.8% |
| Market cap | $1.9B | $24.4B |
| P/E (trailing) | 27.1 | 44.8 |
| Dividend yield | 0.00% | 0.25% |
| Sector / category | US Listed | Health Care |
Year-by-year returns
| Year | ATEX | WST |
|---|---|---|
| 2022 | -45.3% | -49.7% |
| 2023 | +3.6% | +50.0% |
| 2024 | -8.0% | -6.8% |
| 2025 | -28.8% | -15.7% |
| 2026 | +333.7% | +26.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ATEX and WST good diversifiers for each other?
By historical standards, yes. A correlation of -0.20 means the two rarely move for the same reasons.
FAQ
What is the correlation between ATEX and WST?
The ATEX/WST correlation stands at -0.20 on a 3-year window (1 year: 0.22, 5 years: -0.08), computed from weekly returns as of 2026-08-27.
Is WST a good diversifier for ATEX?
By historical standards, yes. A correlation of -0.20 means the two rarely move for the same reasons.
What does a correlation of -0.20 mean?
On the −1 to +1 scale, -0.20 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/atex-vs-wst.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/atex-vs-wst/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ATEX correlations · WST correlations
